Fall is a great time to plant Arborvitae. Arborvitae are easy to transplant in the fall. Most trees and shrubs can be transplanted well into the fall as long as the ground is not frozen. Here at Highland Hill Farm in rural Fountainville Pa, our ground is dig-able for about 10 months of the year. Only in January and February do the ground temperatures get cold enough to really prevent transplanting of our Arborvitae.